diff options
| author | Tom Tucker <tom@opengridcomputing.com> | 2008-05-28 12:08:48 -0500 |
|---|---|---|
| committer | Tom Tucker <tom@opengridcomputing.com> | 2008-07-02 15:01:55 -0500 |
| commit | e6ab9143719ff76f0b95f0866c4d0f6c743ad2e0 (patch) | |
| tree | 42e95b916e9fbe814d1d61557af478f557f9d750 /net | |
| parent | f820c57ebf5493d4602cc00577c8b0fadd27a7b8 (diff) | |
svcrdma: Move the DMA unmap logic to the CQ handler
Separate DMA unmap from context destruction and perform DMA unmapping
in the SQ/RQ CQ reap functions. This is necessary to support software
based RDMA implementations that actually copy the data in their
ib_dma_unmap callback functions and architectures that don't have
cache coherent I/O busses.
Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_transport.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c index fc86338bcbb..7e8ee66458e 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_transport.c +++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c @@ -150,6 +150,18 @@ struct svc_rdma_op_ctxt *svc_rdma_get_context(struct svcxprt_rdma *xprt) return ctxt; } +static void svc_rdma_unmap_dma(struct svc_rdma_op_ctxt *ctxt) +{ + struct svcxprt_rdma *xprt = ctxt->xprt; + int i; + for (i = 0; i < ctxt->count && ctxt->sge[i].length; i++) { + ib_dma_unmap_single(xprt->sc_cm_id->device, + ctxt->sge[i].addr, + ctxt->sge[i].length, + ctxt->direction); + } +} + void svc_rdma_put_context(struct svc_rdma_op_ctxt *ctxt, int free_pages) { struct svcxprt_rdma *xprt; @@ -161,12 +173,6 @@ void svc_rdma_put_context(struct svc_rdma_op_ctxt *ctxt, int free_pages) for (i = 0; i < ctxt->count; i++) put_page(ctxt->pages[i]); - for (i = 0; i < ctxt->count; i++) - ib_dma_unmap_single(xprt->sc_cm_id->device, - ctxt->sge[i].addr, - ctxt->sge[i].length, - ctxt->direction); - spin_lock_bh(&xprt->sc_ctxt_lock); list_add(&ctxt->free_list, &xprt->sc_ctxt_free); spin_unlock_bh(&xprt->sc_ctxt_lock); @@ -328,6 +334,7 @@ static void rq_cq_reap(struct svcxprt_rdma *xprt) ctxt = (struct svc_rdma_op_ctxt *)(unsigned long)wc.wr_id; ctxt->wc_status = wc.status; ctxt->byte_len = wc.byte_len; + svc_rdma_unmap_dma(ctxt); if (wc.status != IB_WC_SUCCESS) { /* Close the transport */ dprintk("svcrdma: transport closing putting ctxt %p\n", ctxt); @@ -377,6 +384,7 @@ static void sq_cq_reap(struct svcxprt_rdma *xprt) ctxt = (struct svc_rdma_op_ctxt *)(unsigned long)wc.wr_id; xprt = ctxt->xprt; + svc_rdma_unmap_dma(ctxt); if (wc.status != IB_WC_SUCCESS) /* Close the transport */ set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); |